Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd56ae2ce2aba248…

MALICIOUS

PDF

46.8 KB Created: 2020-09-01 00:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f80a7231abc71cc0d2b7227bfc9cdd SHA-1: 4bcca6ed34796d0e782c0fe6f80ce529d46eeed6 SHA-256: dd56ae2ce2aba248739112314d98ec5681cfb294e0837dc50c289a171b6cbb6a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'choosing the correct answer questions'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=choose+the+correct+answer+questions
    • https://static.usrfi
    • https://static.usrfiles.com/ugd/cc03df_0e30b68c36634931b40684a0c98f85fa.pdf
    • https://static.usrfiles.com/ugd/824332_3e833cc1906640feb6e464a364fb99ec.pdf
    • https://static.usrfiles.com/ugd/6924eb_f6caad470f32446d968ef7e0576b1bc3.pdf
    • https://static.usrfiles.com/ugd/7d21c0_ad172b10887349bba91037f307ddfe94.pdf
    • https://static.usrfiles.com/ugd/affaa6_d05ec5b93be44692adec6e3805b0a716.pdf
    • https://static.usrfiles.com/ugd/b8c837_67112111a96a4c859b9d4c8713297942.pdf
    • https://static.usrfiles.com/ugd/1a89c8_312ec00bbe8f48fdac67edcad54b18a5.pdf
    • https://static.usrfiles.com/ugd/f84671_d3cc527ea49b4e3e8c1f93c05328be6d.pdf
    • https://static.usrfiles.com/ugd/38bf1f_8d9bcb189bbb4476bb7103aa59418cea.pdf
    • https://static.usrfiles.com/ugd/2ca09c_b1ba852a81e74a1fbf4ab80769993c41.pdf
    • https://static.usrfiles.com/ugd/3f4b99_086875067aa84df38bc788eab087f3e4.pdf
    • https://static.usrfiles.com/ugd/f1d680_09da3444000740f6aa20bbd0907fd577.pdf
    • https://static.usrfiles.com/ugd/b8c837_e85dd171fe154ea7a1a64fa96965ea2d.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007955.bin
98010edb592f19044257542cc22776c0c6fb086b94e8ccef8be7e564365252df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7955 4980 bytes
font_01_sfnt_off00008a4e.bin
6b931501a671c78db60b32e2db9e3c7dfd6eb750ad2cc8f91f701f506fe170f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4E 10612 bytes

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